<u>Confidence interval for population proportion is </u>
<u>sample proportion +/- confidence coefficient*standard error of p </u>
<u>Sample proportion = p = x/n = 180/300 = 0.6 </u>
<u>Confidence coefficient is the critical value of z for 95% confidence level = 1.96 </u>
<u>Standard error of p = sqrt [p*(1-p)/n] </u>
<u>= sqrt [0.6*0.4/300] </u>
<u>= 0.0283 </u>
<u>The CI is </u>
<u>0.6 +/- 1.96*0.0283 </u>
<u>0.6 +/- 0.055 </u>
<u>lower boundary is 0.6-0.055 = 0.545 </u>
<u>upper boundary is 0.6+0.055 = 0.655 </u>
<u>The CI is (0.545, 0.655)</u>
The answer would be one and the equation to get that answer would be
1 - (1 - 1)
PEMDAS is the steps to do Order of operations...
P- parentheses
E- exponents
M- Multiplication
D-Division
A- Addition
S- Subtraction
You do p first e next then either m or d then a or s
1 nm = 0.000001 mm
105 * 13.6 * 0.000001 = 0.1428 mm